adverb

fiercely

fiercely, intensely, violently

The lion roared fiercely.

The lion roared fiercely.

She fiercely defended her beliefs.

She fiercely defended her beliefs.

((modifies a verb)) fiercely The wind blew fiercely all night.

Synonyms: intensely, violently, aggressively; Antonyms: gently, mildly, calmly

From the adjective 'fierce' plus the adverb-forming suffix '-ly'. 'Fierce' comes from Latin 'ferus', meaning 'wild'.

Imagine a 'fierce' animal acting 'fiercely'. The '-ly' ending signals that it's an adverb describing an action.

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